Reversible petroleum and compressed-air motor.



M. BERLIET. REVERSIBLE PETROLEUM AND UOMPRESSED AIR MOTOR.

APPLICATION FILED EEB.*24, 1998.

Patented July 27, 1909.

3 SHEETS-SHEET 1.

M. BERLIBT. REVERSIBLE PETROLEUM AND COMPBESSED AIR MOTOR. APPLIOATION FILED FEB. 24, 1908.

929,540. Patented July 27, 1909.

3 SHEETS-SHEET 2.

o |-1 C) N 2H l I o l m a I; L

C) @o 0 r-i Ok o0v n j WV MW Wfl/26.53%.- l wm/01':

am! )zal/'2M v M NORRIS PETERS. INC Lx'MC.. WASMNGTON D C M. BERLIE'T. REVERSIBLE PETROLEUM AND 'COMPRESSED AIR MOTOR.

APPLIOATION FILED r-BB. 24, 190s.

w ,mm y m FIG-6 UNITED sTATEs PATENT oEEIoE. l

MARIUS BERLIET, OF LYON, FRANCE.

EEvEEsI'BLE PETROLEUM AND oOMrREssED-AIE MOTOR.

is to enable the compressed air to be used simultaneously with the combustion of the explosive mixture, by which means a considerable augmentation of the'power of the mot-or may be obtained during a limited tlme when vspecial occasion arises. In this form of construction, the various phases of running are obtained by thelongitiulinal displacement vof a rotary single cam shaft. which governs the compresse-d air; as regardsl t-liesecond cam shaft, namely the one. which governs the suction and exhaust'valves vfor the explosive mixture, it is not displaced but is revolved only. As `the lifting of the valvesonly takes place every two revolutions of the motor, the compressed air is sent into that cylinder the valves of which are suitably governed. Y

In the accompanying drawings, a motor comprising the improved arrangements which form the yobject .of the present application is shown, in )xvhichf- Figure `1 is a partial longitudinal section along the axes of the air admission.va-lves. Fig. 2 is a partial longitudinal'section along the axes of the petrol admissionvalves;and Fig. 3, a transverse 'section along the axis of one of the cylinders.

Y This motor has six cylinders 1, Q, 3, 4, 5

land 6 arranged two by two in pairs, operating by pairs a crank shaft 7 provided with three cranks arranged at 120 relative to one other, two cylinders of the same pair being shutl off or disconnected for one revolution for a four stroke movement.

The crank shaft 7 has a pinion 8 which operates two pinions 81 keyed on two cam shafts 9 and 10 situated on either side of the crank shaft. The shaft 9 operates the petrol admission valves 11, 12, 13, 14, 15 and 16 and the exhaust valves 17, 18, 19, Q0, 21 and 2Q. vTheshaft isl fixed longitudinally and has only one set of cams producing the operation of the valves as usual.

Specication of Letters Paten-t.` AApplication led February 24', 1908. Serial No. 417,378.

Patented July 27, 1909. l

The shaft' 10 `operates the vcompressed air admission valves 23, 24, Q5, y26, 27 and 28. This shaft is adapted to bedisplaced longitudina-lly assuming three differentpositions corresponding to running forward, to stopping and to backing. The displacements of this shaft are governed by a forked lever 29 shown in Fig. 1 in dotted lines in its three positions 30, 31 and 32."The 'position 30V corresponds to backing, the position 31 to the stationary position (this is the position in which the shaft' 10 is shown in Fig. 1),

and the position 32 to forward running. The shaft 1() has ytwo sets of cams,44 the' vone 3st, 35, 36,37 and 38 foi-'forward running, the other 39, 40, vil, 42, 43 and 44 for `back-y ing. lVhen the shaft l() is in the osition of repose the rollers of the pushers o the valves travel on cylindrical bearings arranged on the shaft between the earns. The coinpressed air is under greater pressure than the products' of combustion in the cylinders after explosion.

This motor can operate'underthe followingconditionsr (a) forward running, comprising:-1. Running with compressed air for starting. 2. Mixed running by compressed air and kby )eti-ol. running with petro alone. with compressed air onlv.

For starting (forward running) the camA shaft 10 is pushed from right to left lbybringing the forked lever 29 into the posi-v ilon B v this movement the cams 33, 34.

3. Four-stroke (b) backing 35, 3G, 37- 'and 38 are brought underthe roll-I ers operating the valves and which cams in consequence of their profile, allow an admis sion'r greater than 120 and lift one or two valves which give passage to thel compressed air arriving at 45, which, penetrating into the cylinders, effects the starting of the motor. The exhaustvalves of the expanded air are operated by the cam shaft 9.'

The cams for admitting air are arranged so as to reduce gradually and automatically the admission of xair up to 80, so as to diminish its consumption. These cams are also arranged so as only to admit air. to the cylinders (hiring one revolution 1n each two. so that at each revolution, the cylinders 1, 3 and 5 for instance, act as motors and the cylinders 2, 4 and 6 run empty, then .1n the following revolution, the contrary 1s the case. During that downward stroke 111 each cylinder in which compressed air is not being admitted the suction of the carbureted movement, exhaust of compressed air. Halt revolution, descendmgmovement, suctionv of carbureted air. 4f. Half revolution, rising movement, compressionof earbureted air and ignition. The movement thus .automatically passes into the mixed running= duringlwhich each cylinder works with 'pe-' trol in a four stroke cycle, compressed air being admitted after the explosion. This admission of compressed air very considerably increases the diagram furnished by the running with petrol, and inay be of great utility, because it enables the motor to .increase its power in certain cases.

When it is desired to stop the admission of compressed air, it is suiicient to return the shaft 10 to its mean position corresponding to thel position 31 of the fork 29; the roller of the air admissionvalves traveling on the cylindrical parts, the valves 23, 24, 25, 26, 2T and 28 will remain pressed on their seats, land the motor will lwork with petrol alone during the ordinary four-stroke cycle.

In order to start the motor for backing, it is suflicient .to return the shaft 10 to-the position 30. The cams 39', 4:0, 41, 42, 43. and 44 come into action,v and in consequence of their position will effect the admission of air under such conditions that the motor will revolve inthe reverse direction. The exhaust will be governed by the shaft 9 and will take place by the admission valves in the feed pipe coming fromV the carbure er. As in running forward with compressed air, the admission of lair into each cylmder takes place once in two revolutions. l

lVhat I claim as myinvention and-desire to secure byLetters Patent of the United States is s l. In a motor comprising aplurality' of cylinders and pistons, two sets of admissionvalves and a set of exhaust valves to said cylinders, means fo'r supply of carbureted mixture to one set of admission valves, means for supply of compressed air to the other set of admission valves, a rotary cam shaft for controlling ythe former set of admission and exhaust valves, a rotary cam shaft for controlling the other set of admission valves, means for giving longitudinal movement to the last named cam shaft, and means for synchronizing the rotary movements of said cam shafts, the said cam shafts being set in relative phases so that when in action the two sets of admission valves are operated on pistons. y s

2. In a motor comprising a plurality of cylinders and pistons, two sets of admission valves, and a set of exhaust valves to said cylinders, means for supply of carbureted mixture to one .set of admission Valves, means for supply of compressed air to the other set of admission valves, a rotary cam shaft controlling they former set of admission and exhaust valves, a rotary cam shaft for .controlling the other set of admission valves, the` last'named cam shaft having cams for operating the valves for forward running, non-operative surfaces for leaving the valves at rest, and other cams for operating the valves, for reverse running, means for giving longitudinal movement to said last' mentioned cam shaft,`and means for synchro; nizing the rotary movements of said cam shafts, the said cam shafts being relatively set so that the cams of the said shafts when in action operate the'respective sets of admission valves4 on alternate piston strokes respectively.

In witness whereof. I have signed this alternatestrokes of their respective cylinder specification in the presence of two witnesses. l

MARIUS BERLIE'I.

I/Vitnesses: THos. N. BRoWNE, GUILLAUME PIoCHE. 

